Combination lock



Nov. 10, 1931. s. N. HOPE ET AL 1,331,177

COMBINATION LOCK.

Filed Feb. 27. 1929 2 Sheets-Sheet 1 Nov. 10, 1931. s. N. HOPE ET AL 1,831,177

COMBINATION LOCK Filed Feb. 27. 1929 2 Sheets-Sheet 2 Patented Nov.10, 1931 VILLE', ILLINOIs, ASSIGNORS fro DUDLEY .-ILLINOIS,'A CORPORATION OF ILLINOIS SAMUEL EWTON norm, or WAUWATOSA, wIsoONsIN, AND J HN J; NnITz,-or N PER' COMBINATION OOK l gpplication filed February 27, 1929L2Seria1 1i' 0. 343,034.

The'presentinvention pertains to locks, and more particularly to looks of the permutation or keylesstype, especially adapted for use in connection with various types of closures, suchas lockers, wall safes and the like. j More specifically the invention residesin the provision ofioertain novel and ,us'efulimprovements in looks of this general character, and has for a primary obje'ctto produce an improved lock 'that is simple, "strong and durable in construction, and capable of economical manufacture. v 7 Another object is to provide improved means for adjusting the 'graduateddial for varying the eombination of the lock. A further object is to provide means, operable independently of the means for adjusting the tumblers, for actuating the lock bolt when the tumblers have been set in combination, It consists. in certain'features and elements ofconstruction, incombination, as herein shown and de-' scribed,and as indicated by the claims. j j .In thefdr'awings: b I v g Figurel is a face view inelevationof the lock? embodying this invention shown applied to a panel type of closure member. Figure Qisan edge view 'inelevat on. I

igure 3 is a vertical axialfl'seotion, taken as indicated at line 3- 3 on Figure'lk Figured is a rear view with the back plate of the lock casing removed, showing the mechanism adjusted ready for retraction of the lock bolt. 7 I p Figure 5 is aview similar to Figure'l, showing the mechanism in unlocked position. Figure'G'is an enlarged fragmentary axial section showing details of construction.

Figure 7 is a trans-verse section through the operating knobs, taken as indicated at line 77 on Figure with'the back plateremoved. Figure9 "isa perspective view of the lock Figure 10 is aperspective disassembly of the rotating elements of the lock. y f Figure 11 is a perspective view of the casingbackplateg V j l Asillustratedin the drawings the lock is shown afiixed'to the rearlor inner side on Figure 8 is a perspective View of the casing OCK CORPORATION} OF- .CHICAGO,

panehli), which may be understoodgto be either a movable closure .1nember 'orfa co operating panel adjacent the movable memtber,"for closures such as lockers, vaultsfetc. Thelock comprises a'casing, 11, ofrectangular form, provided with a removable back plate, 12,and a front plate, 13, rigidly secured thereto and having outwardly project- Ing lugs, 14, at top andbottom which arese-' cured togthe'panel, 10, by button-head bolts, 15 said bolts being arrangedwith their heads exposed to the outside of the paneland with thenuts, 16,011 the inside of the panelto pre 'clude removal of, or tampering with the lock from the exterior. If desired this front plate may be fabricated as an integral part of the casing, and as shown, said front plate is formed with an outwardly extending annular flange or sleeve, 17,: adapted to befproj'ected through an aperture insaidpanel and serve as abearing iniwhich is journaled a rotatable ilrgem'ber serving as a tumbler actuating knob, 1 Saidknob is of hollow "'thimble formation having'rits'inner end provided with a transverse flange, 2-1, adapted to abut against the V inner side of said front plate, thuslocking the thimble, 18, in the casing against'withi drawal inan outward direction. Loosely circumscribing the sleeve, 17, and rotatable with the knob, is an'annular indicator member, 22, provided 'with an outwardly flared skirt flange, 23, adaptedto be seated against'the outer surface [Ofthfk panel 10. Said indicator is provided with an inwardly extending lug or key,24,adapted to be slidably'e'nteredin a cooperating longitudinal groove, 25, formed in the'wall of the hollow knob, 18, by means ofwhich connection the indicator is caused to be rotated in either direction withfs'aid knob. Aradially extending pointer,l26, is

formed above said skirt fiange, adapted to be registered or aligned with, the graduation of a dial plate, 27 disposedconcentrically with respect to the axis of rotation of the, knob. Said 7 dial plate is mounted toioverl'ap the skirted flange .of' the indicator for holding the latter captive against axialishifting on the'knOb, but permitting rotaryv driving 'en gagement'fthe'r'ewithv alltimes." The dial its are graduations, with a groove aligned witheach graduation on thedial plate. Formed in said escutcheon plate 2 9, at any'convenient point within the area of the corrugated flange 28, here-in shown at upper central position, is an inwardly extendingcnode or depression,

32, adapted to register with one of the grooves Ill) 30 for firmly securing thedial plate in a fixed. position: of adjustment. It will now be apparent that the combination of the lock may be quickly and easily changed, by merely loosening bolts l'5 to realign aidiiferen't groove with the node 32, shifting the zero or start ing point to a new position. Hence, by noting the number of units or graduations that the dial has beenshifted', a corresponding number of units of rotation of the knob may be added or subtracted respectively toythe pre vious combination for ascertaining the new combination. This feature of construction is especially desirable in looks of this type when applied to lockers for schools, clubs, etc. WVhere the-locker is used for a season or certain periodof time and then reassigned, (frequently to different individuals andin order to prevent unauthorized access tO' 2\ locker by theperson formerly oecupyingit, the combination is usually changed each time the locker is assigned to'a newindividual. In prior constructions, 'the alteration of a combination necessitated complete disassembly of the lock and relocation of certain of g the interengaging members of. the tumblers,

which requires considerable time. s

' Disposed concentrically in and rotatable independently'of the tumbler actuating knob 18 is a spindle extending into the casing, having its inner end formed with a bore 36 adapted to be loosely journaled on a trunion or stud 37 secured to the inner wall of the back plate 12. The other end of the spindle 35 is supported in central position in the outer end of the knob, 18, and'in aninwardly offset disk 38 rigidly secured inside the knob adjacentthe inner end: the outer end of the spin die is provided with a knob, 39, projecting axially beyond said knob, 18, for manipulation ofsaid spindle. 7 (I V E'Slidably supported in the casing is a laterally shiftable lock bolt, 41, whose movement 7 V is controlled bythe usual series" o'fdisk't'ype 't'umblers,42,.loosely mounted on the spindle; notches 43' opening at the periphery and adapted to receive the cooperating projections 44 of the lock bolt, when said notches are aligned by the setting of the tumblers in a predetermined arrangement or combination to permit free movement of the lock bolt into and out of locking position The tumblers are axially separated on the spindle by horseshoe shaped spacers, 45, which are anchored oneaapair of studs, 46,. extending? inwardly from thefront side of th'e'casing; these studs serve to-support the spacers in centraitirelation tothe spindle and insure freedom of operation of the inter-engaging or driving lugs, 47, on the respective tumblers, by means of 'wlii ch lugsthe tumblers may be moved to their predetermined. lockbolt releasing position, by the rotation offthe master tumbler first in one direction and thenin the other, as is well understoodiin the art. A

Rigidly secured in the'inner end of said knob 18 is a disk,49,.having a notchor slot, 50,.which constantly engages the driving lug 47 of the first tumbler 42. .A coil spring ,,51', loosely'carried on the spindle and interposed between the innerdisk, 3 8 and the first, or master, tumbler, as shown: in Figure 6, provides friction between the tumblers and spacers which tends to hold the tumblers'inithe positions at which they are adjusted inset ting the combination, and also keeps them in their properplanes to insure engagement of their driving lugs bywhich motion is imparted to the successive tumblers-for adjust} ing them to position' i V The inner end of thespindle-is provided with a reduced portion, 55,.forming a transerse shoulder, 56, against which is mounted V a bearing washer, '57, and outsideof the washer isa. radially extending arm, 58, rigidly 1o mountedon said reduced portion, by rivetin over the end thereof. The outer end of sai arm is .slidably en agedia a recess, 59, formed in the outer surface of the lockbolt,,4l ,.for causing shifting of said lock bolt into and out of locking position by the relativerotation of the spindle through its knob '39 when said tumblersh-ave been adjusted with their slots in alignment to release said lock-bolt.

The washer 57 is relatively small in diameter to reduce the frictional engagement with the end tumbler. Thus, after the tumblers have been set in combination by, the actuatingknob 18, the lock bolt may be. freely shifted hack and forth by the spindle knob 39' without danger of upsetting the combination, This construction is particularly desirable in locks of this general character as it will normally prevent inadventently locking the bolt' when the door is open by mere accidental turning of the knob or jarring. of the door.

We claim y i i combination with a casingv and a mounting member therefor, of a rotatable tumbler actuating knob projecting outwardly from 1. In a lock of the character described, I

the casing and beyond said mounting memher, a graduated dial plate mounted concentrically of the axis of rotation of the knob,- and an escutcheon plate secured to said mounting member and adapted to normally maintain said dial in a fixed position, said escutcheon plate and dial plate having interengaging features for detachably securing said dial plate in a plurality of positions of rotative adjustment with respect to said axis for varying the combination of the lock.

2. In a lock of the character described, the I combination with a closure having a closure tion, and having a pointer overlapping the face of the dial plate, said indicator and knob having interengaging features whereby said indicator is rotatable with the knob.

6. In the combination defined in claim 5,

said interengaging features including an inwardly extending tongue on said indicator flange engaged with a longitudinal groove formed in said knob. 7 V

SAMUEL NEWTON HOPE. JOHN J. NEITZ.

member and a lock casing secured thereto,of V

a tumbler actuating knob projecting from the casing and accessible from the exterior of the closure member, a graduated dial platedisposed concentrically about the axis of rota tion of said knob, an escutcheon plate for retaining the dial plate in central position, said escutcheon plate and dial plate having interengaging' features for detachably securing the dial plate in a plurality of positions of rotative adjustment with respect to said axis,

and means for securing the escutcheon plate to the closure member, accessible from the inner side of said closure member.

3. Inthe combination defined in claim 2,

said interen aging features comprising radially exten ing grooves formed around the peripheral edge of the dial plate, and a node formed on the inner surface of the escutcheon plate, cooperating with any selected one of said grooves for preventing rotational movement of the dial plate.

4. In a lock of the character described, the combination with a closure having a closure member and a lock casing secured to said member, of a tumbler actuating knob extending from the casing and accessible from the outside of the closure member, a graduated dial mounted concentrically ofthe axis of rotation of the knob, an escutcheon plate secured to said closure member and overlap-' ping theouter peripheral edge of the dial 7 outside. of the closure member, a graduated dial mounted concentrically ofthe axis of rotation of the knob, an escutcheon. plate secured to said closure member and overlapping the outer peripheral edge of the dial plate for holding the latter captive, and an indicator including an annular flange disposed between the dial plate and the closure member for securing the indicator in posi- 

